William Beardmore, 1st Baron Invernairn, DL, known as Sir William Beardmore, Bt, between 1914 and 1921, was a British industrialist, founding the eponymous William Beardmore and Company.

William Beardmore and Company was a British engineering and shipbuilding conglomerate based in Glasgow and the surrounding Clydeside area. It was active from 1886 to the mid-1930s and at its peak employed about 40,000 people. It was founded and owned by William Beardmore, later Lord Invernairn, after whom the Beardmore Glacier was named.